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Using four between-subjects experiments ( N 1 = 106, N 2 = 166, N 3 = 159, and N 4 = 164), this project tests the ways audiences process grammatical errors in news articles. In all, results suggest that readers perceive stories with grammatical errors to be lower in quality, credibility, and informativeness, but the number of errors needed is relatively large. Analysis shows amplified effects for people who report concern about grammar, and, to a lesser degree, people with knowledge of grammar rules. Given these results, the findings suggest a nonlinear, nonuniversal effect of grammatical errors on readers of news articles.
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Appelman et al. (2017) studied this question.
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